Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}
Abstract
We use the fluctuationexchange approximation on the realfrequency axis to calculate the quasiparticle selfenergies and dynamic spin susceptibilities for the bonding and antibonding bands of two Hubbard planes coupled by interlayer hopping {ital t}{prime}. In the normal state we find that for increasing {ital t}{prime} ({approx_gt}0.3{ital t}) the interband spin susceptibility {chi}{sup {minus}} becomes much larger than the intraband susceptibility {chi}{sup +}. The {ital q{searrow}}, {omega}, and {ital T} dependence of Im{chi}{sup {minus}} agrees qualitatively with magnetic neutron scattering data on YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. The ratio of the interlayer and intralayer spinecho decay rates, {ital T}{sub 2}/{ital T}{sub 2}{sup {asterisk}}, becomes for {ital t}{prime}=0.3{ital t} roughly equal to the recent data of nuclearquadrupoleresonance spinecho double resonance. The splitting of the renormalized Fermi lines has about the same magnitude as the splitting observed by angleresolved photoemission spectroscopy. The superconducting transition temperature for {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}}wave pairing decreases rapidly as {ital t}{prime} increases above {ital t}{prime}{approx_equal}0.3{ital t}. Our results for the reductions of intraplane magnetic correlations and pairing correlations by interlayer hopping are consistent with results of quantum Monte Carlo simulations. {copyright} {ital 1996 The American Physical Society.}
 Authors:

 Abteilung fuer Theoretische Festkoerperphysik, Universitaet Hamburg, Jungiusstrasse 11, D20355 Hamburg (Germany)
 Publication Date:
 OSTI Identifier:
 383259
 Resource Type:
 Journal Article
 Journal Name:
 Physical Review, B: Condensed Matter
 Additional Journal Information:
 Journal Volume: 54; Journal Issue: 9; Other Information: PBD: Sep 1996
 Country of Publication:
 United States
 Language:
 English
 Subject:
 66 PHYSICS; HIGHTC SUPERCONDUCTORS; QUASI PARTICLES; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; SELFENERGY; MAGNETIC SUSCEPTIBILITY; SPIN ECHO; HUBBARD MODEL; GORKOVELIASHBERG THEORY; BILAYERS
Citation Formats
Dahm, T, Manske, D, and Tewordt, L. Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. United States: N. p., 1996.
Web. doi:10.1103/PhysRevB.54.6640.
Dahm, T, Manske, D, & Tewordt, L. Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. United States. doi:10.1103/PhysRevB.54.6640.
Dahm, T, Manske, D, and Tewordt, L. Sun .
"Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}". United States. doi:10.1103/PhysRevB.54.6640.
@article{osti_383259,
title = {Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}},
author = {Dahm, T and Manske, D and Tewordt, L},
abstractNote = {We use the fluctuationexchange approximation on the realfrequency axis to calculate the quasiparticle selfenergies and dynamic spin susceptibilities for the bonding and antibonding bands of two Hubbard planes coupled by interlayer hopping {ital t}{prime}. In the normal state we find that for increasing {ital t}{prime} ({approx_gt}0.3{ital t}) the interband spin susceptibility {chi}{sup {minus}} becomes much larger than the intraband susceptibility {chi}{sup +}. The {ital q{searrow}}, {omega}, and {ital T} dependence of Im{chi}{sup {minus}} agrees qualitatively with magnetic neutron scattering data on YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. The ratio of the interlayer and intralayer spinecho decay rates, {ital T}{sub 2}/{ital T}{sub 2}{sup {asterisk}}, becomes for {ital t}{prime}=0.3{ital t} roughly equal to the recent data of nuclearquadrupoleresonance spinecho double resonance. The splitting of the renormalized Fermi lines has about the same magnitude as the splitting observed by angleresolved photoemission spectroscopy. The superconducting transition temperature for {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}}wave pairing decreases rapidly as {ital t}{prime} increases above {ital t}{prime}{approx_equal}0.3{ital t}. Our results for the reductions of intraplane magnetic correlations and pairing correlations by interlayer hopping are consistent with results of quantum Monte Carlo simulations. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.54.6640},
journal = {Physical Review, B: Condensed Matter},
number = 9,
volume = 54,
place = {United States},
year = {1996},
month = {9}
}